Title :
Low complexity down-sampled MMSE (DMMSE) channel estimation for downlink OFDMA IEEE 802.16e system
Author :
Galih, Savitri ; Karlina, Riafeni ; Nugroho, Fifin ; Irawan, Ade ; Adiono, Trio ; Kurniawan, Adit
Author_Institution :
Sch. of Electron. & Inf., Bandung Inst. of Technol., Bandung, Indonesia
Abstract :
In this paper, we present low complexity down-sampled MMSE channel estimation. We reduced MMSE channel estimation complexity by downsampling the MMSE weight matrix. The simulation results show that the bit error rate (BER) performance significantly improved over the least square channel estimation and has comparable BER performance with MMSE channel estimation at low SNR with significant decrease i.e 57% decrease in computational complexity.
Keywords :
OFDM modulation; channel estimation; computational complexity; error statistics; frequency division multiple access; least mean squares methods; matrix algebra; MMSE weight matrix; bit error rate; computational complexity; downlink OFDMA IEEE 802.16e system; least square channel estimation; low complexity down-sampled MMSE channel estimation; Bit error rate; Channel estimation; Computational complexity; Computational modeling; Downlink; Informatics; Least squares approximation; OFDM modulation; Transfer functions; WiMAX;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2009 3rd IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4076-4
DOI :
10.1109/MAPE.2009.5355916
